Valve mechanism for engines.



E. A. MOORE.

VALVE MECHANISM FOR ENGINES. APPLICATION IIL'ED SEPT. 5, 1911.

1 096 259. Patented May 12, 1914.

COLUMBIA PLANOGRAPH XL-WASHINGTON. n c.

TEE pga nrrr ora on ERNEST A. MOORE, OE JOLIEI, ILLINOIS, ASSIGNOR- TOBATES MACHINE 00., OF JOLIET,

ILLINOIS, A CORPORATION OF ILLINGIS.

VALVE MEGI-IANISM FOR ENGINES.

To all whom it may concern Be it known that I, Emvnsr A. Moore, asubject of Great Britain, residing in Joliet, in the county of Will andState of Illinois, have invented a new and useful Improvement in ValveMechanism for Engines, of which the following is a specification.

This invention is an improved means of operating Corliss valves on thereleasing principle at high speeds.

My object has been to devise a valve gear in which the latching actionwill be accomplished at the highest speeds, without the use of anyspring, roller, or guide, or any other mechanical device, therebyreducing wear and eliminating practically all noise in operation; and atthe same time to make a simple and accessible arrangement of parts.

The invention is found in the mechanism described below, andisillustrated also in the accompanying drawing in which latter- Figure 1is a partial elevation of a Corliss engine provided with my improvedgearing. Fig. 2 is a front elevation and Fig. 3 is an end elevation ofthe valve gear, and Fig. 1 is a section on the line H of Fig. 3.

In said drawing 5 represents the cylinder of the engine, and 6, 6 arethe dash pots and 7, 7 the drop rods operating the same. The usual wristplate is shown at 8, and is connected to the dash pot mechanism by rods9. The dash pot lever 10 of Figs. 2 and 3 is in the form of a bell crankand is keyed to the stem 11 of the valve controlled by the dash pot, onearm of the lever carrying the dash pot rod 7 and the other arm carryingthe catch block 12. The steam arm 13 is provided with a stop for thecatch block at 14- and is joined to and operated by the wrist plateconnection 9, or any other source of reciprocating motion. Mounted inthe steam arm is the latch shaft 15 on the inner end of which is securedthe knock ofi bar 16 whichis an arm rising out from the shaft and whichis provided with a weighted lower end 23. A latch 17 also is mounted onthe shaft 15 and extends laterally from the shaft as shown and isadapted to engage the catch block. The parts 15 and 17 may be andpreferably are in one piece. A ring 18 Specification of Letters Patent.

Application filed September 5, 1911.

Patented May 12, 1914.

Serial No. 647,739.

extends around the bonnet and carries a knock ofi block 19 located whereit will contact with the arm 16, and said ring also carries the safetycam 20 intended to come into operation in the event of any mishap to thegovernor of the engine. The ring 18 is controlled by the governor, notshown, in the usual manner by means of the rod 21.

The operation of the mechanism is as follows: In opening the valve, therod 9 moves to the left, and the latch 17 engages with the catch block,and continues so engaged until the bar 16 encounters the knock ofi"block 19.

This contact causes a rising of the latch 17 and the release of thecatch block. The dash pot then comes into action and the lever 10returns the catch block to its original position. The latch shaft andthe knock oft bar are so constructed and balanced that the inertia dueto the motion and the gravity of the parts cause an automatic reengagingby the latch with the catch block at the end of the return stroke,without the use of any roller spring, guide, or other mechanical device.

The depth of the latch and the amount of clearance given the latchblocks may be adjusted by the two screws 24 while the mechanism isworking.

From the drawing it will be noted that the knock-off bar 16 and latch 17are positioned on opposite sides of the shaft 15, so that when the latch17 engages the catch block 12, the forces acting on the latch 17 alwaystend to hold the knock-off bar 16 in engagement with the knock-off cam19, thereby preventing any premature disengagement of the latch 17 andcatch block 12.

' I claim 1. In a valve gear, in combination; a drop rod; a lever towhich said drop rod is connected, said lever being secured to the valvestem and having a catch block thereon; a steam arm having a latch shaftpivotally mounted thereon; a latch carried by said shaft and adapted toengage with said catch block; a knock-01f bar secured to said shaft; agovernor-controlled knock-off cam for operating said knock-off bar, theknock-off bar and latch being so arranged that the forces tomaticallycause the engagement of the catch block and latch, and means for achust-10 mg the amount of oscillation of said shaft.

ERNEST A. MOORE.

0n the-latch, when acting against the catch, will positively hold theknock-off bar against said knock-0H cam, substantially as specified.

2. A valve mechanism comprising a catch block, a freely movable shaft,said shaft being provided with a latch adapted to engage and eoeperatewith the catch block, said shaft and latch being gravity operated to au-Witnesses AUeUsT BELTZNER, J12, JOHN K. BUSH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

